Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

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Old Jan 20, 2006 | 05:51 PM
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Default Need some help

hey everybody,

I could use some help here. I did some searching but there are so many posts bout different rears and everything, i didn't really get a straight answers

you can see my mods below, most were done this winter so i haven't driven the car yet.

i know i need a 12-bolt, b/c i think a 9" would rob too much power

i don't really want to buy a new rear end, since they cost so much

is it possible to piece one together? I didn't know if there are 12 bolts in other cars/trucks that'll fit etc

i could use some help with that
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Old Jan 21, 2006 | 04:05 AM
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anybody?
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Old Jan 21, 2006 | 04:54 AM
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The rear end that is used in the 3rd and 4th gen F bodys use a torque arm. None of the 12 bolts that have been used by GM had a torque arm, and it is practically impossible to retrofit one. Length of the 12 bolt would also have to be the same, or cut down, etc. Bob
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Old Jan 21, 2006 | 10:02 AM
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Even aftermarket 12 bolts have torque arm issues. Get the 9".
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Old Jan 21, 2006 | 11:46 AM
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i've been told that the 9" robs a bunch of power
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Old Jan 21, 2006 | 08:59 PM
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opinons? so i'm stuck buying a new one?

does any certain sponsor seem to have the lowest prices?

now i have to decide 12 or 9
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Old Jan 22, 2006 | 08:14 AM
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A 9" will take about an extra 15-20hp over a 12 bolt. But you will never have to worry about breaking it. Also you can piece together a 9". I know somebody did it on here for a little over $1,000. I don't remember who it was. It will take some searching to find out.
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Old Jan 22, 2006 | 09:54 AM
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what about the torque arm?

will any 9" work? or do i one from a certain vehicle?
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Old Jan 22, 2006 | 01:48 PM
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I know the 12s and 9's are allot of cash for our cars, and it sucks... but It is just better to go with a new one made for our cars. Bottom line is IT FITS. It will bolt right in and all the LCA's, shock/spring mounts, TQ arm, panrod, swaybar mounts will all be right there, the yoke will be right, won't have to worry about fitting a driveshaft, and you won't have to fight the gear whine problems....unless your really good at setting them up.. Down the road I think it is going to haunt you if your order stuff for the rear and then you have to cut and hack and hammer the stuff to fit. Tons of reasons just so spend the cash and get a new one.

I hated to bite the bullet on a new rear also, but I feel tons better now that it is in and I don't have to worry about it. There is enough things in front of the car that I have deal with.

That is just one mans opinion.
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Old Jan 22, 2006 | 01:56 PM
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A Moser 12 bolt with the truetrak, your choice of gear, is a good way to go. It is $2,350 with the optional 33 spline axles, optional ABS or ABS/TCS and the optional Performance Cover. Shipping is paid by the customer when the rear arrives.

The Moser 9 inch with truetrak is $2,400.00 including shipping.
If you need ABS, they don't make it. If you need ABS/TCS, you in luck! $2,500.00 shipped. Bob
Add $20.00 for the Detroit Locker option. Bob
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Old Jan 22, 2006 | 02:20 PM
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hurm, for the extra $100, a 9" seems like a better idea if I can't break it lol
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